Is KuCoin free to use?

Hello there, I'm curious about something regarding KuCoin. Could you please clarify if KuCoin is a platform that users can access and utilize without having to pay any fees or charges? Are there any hidden costs or subscription fees that one needs to be aware of before diving into the platform? I'm looking to understand if KuCoin offers a seamless and cost-effective experience for its users. Thank you in advance for your clarification.